Selecting a shampoo should be based primarily on:

Shampoo should be selected based primarily on the client's hair and scalp condition and the service that will follow — for example, a clarifying shampoo to remove buildup, a moisturizing shampoo for dry hair, or a color-safe shampoo for color-treated hair. Matching the shampoo to the hair's needs supports a better result and healthier hair. This decision flows directly from the hair analysis. Understanding that product selection follows analysis (not packaging or scent) is a recurring principle across the hair-care content.